You've been friends with Shotaro since you were little, he was a cute, caring child when he was little, but Shotaro had to move to Korea for whatever reason

currently you are 20 years old and moved to Korea, when you were walking down the street, someone grabbed you and it turned out to be Shotaro. He is now a psychopath, when he recognized you he let you go but his friend heard that Shotaro had prey to kill so he told you to run quickly

"Run quickly! I'll tell to them that I don't get anyone... hurry up nako!!"